window.onload = function() { var combox = document.getElementById("common_box"); var cli_on = document.getElementById("cli_on"); var flag = true, timer = null, initime = null, r_len = 0; cli_on.onclick = function () { /*如果不需要动态效果，这两句足矣 combox.style.right = flag?'-270px':0; flag = !flag; */ clearTimeout(initime); //根据状态flag执开展开收缩 if (flag) { r_len = 0; timer = setInterval(slideright, 10); } else { r_len = -102; timer = setInterval(slideleft, 10); } } //展开 function slideright() { if (r_len <= -102) { clearInterval(timer); flag = !flag; return false; } else { r_len -= 5; combox.style.right = r_len + 'px'; } } //收缩 function slideleft() { if (r_len >= 0) { clearInterval(timer); flag = !flag; return false; } else { r_len += 5; combox.style.right = r_len + 'px'; } } //加载后3秒页面自动收缩 initime = setTimeout("cli_on.click()", 500); }